Drill aligning adapter attachment for liners and other rock drills



Nov. 20, 1945. c. D. NELSON 2,339,532

I DRILL ALIGNING ADAPTER ATTACHMENT FOR LINERS AND OTHER ROCK DRILLSFiled March 22, 1944 2 Sheets-Sheet 2 Inventor Chm/we B. Ne/san.

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Patented Nov. 20, 1945 UNITED, STATES PATENT? OFFICE 2,389,532] 1 DRILLALIGNING ADAPTER ATTACHMENT FOR LINERS AND OT E noon DRILLS Clarence D.Nelson, Mullan, Idaho, assignor of one-half to Edna Hanson, Wallace,Idaho Application March 22, 1944,"Serial No. 527,603 1 2 Claims. (01.255751) This invention relates, to a novel attachment for liners andother types of rock drills, and its purpose is to provide a novel andreliable adapter device which functions to align the steel drill withthechuck on a rock drill machine or device in a mannertominimize'breakage of thesteel, a condition which" repeatedly resultsfrom poor alignment of parts.

Another phase and object of the invention is the provision of analignment adapter attachment of the aforementioned type whose purpose isto assist the operator of drilling machines to effectively andsatisfactorily start holes, and to line up his machine with speed andease, this due to the fact that the drill is always properly maintainedand held firmly in its appropriate drilling position.

In selecting and choosing an attachment structure appropriately designedto fulfill the requirements of my aims, I have evolved a preferredconstruction or arrangement which, through the medium of simpleaccommodation brackets or fixtures may be applied to the frontal end ofconventional drilling machines, of several types; without necessitatingalteration of existing or stock parts of the machine and which is suchas not to interfere with the full stroke of the drill tool and itsretention chuck.

Other features and advantages will become more readily apparent from thefollowing description and the accompanying illustrative drawings.

In the drawings, wherein like numerals are employedto designate likeparts throughout the same:

Figure l is a side elevational view, on a reduced scale of course,showing a conventional type of rock drill equipped with an attachmentarranged and constructed in accordance with the principles of theinstant invention.

Figure 2 is a relatively enlarged View of the frontal end portion, thisshowing the final projected position of the drill chuck and its tool andillustrating how the alignment plate is swung, against spring tension,to what may be designated an out-of-the-way position.

Figure 3 is a top plan view of Figure 1, on an enlarged scale, with theattachment in its operating position and other parts removed forclearness of disclosure of the essential parts.

Figure 4 is a front end elevation of the arrangement seen in Figure 3.

Figure 5 is a view, partly in section and partly in elevation, of thecomplete adapter style drill 4 her.

alignment attachment specifically devised-in accordance with theprinciples of this invention.

Figure 6 i aperspective view of one of the adapter brackets or fixtures.

Figure"? is an edge view of the spring-returned and retained drill steelalignment plate or mem- The attachment, as a whole, is disclosed inFigures 4 and 5 and is denoted by the numeral 8. It is characterized bya substantially rectangular plate 9 having a central notch ID in itsupper end forming a guide and alignment seat for the drill D. The lowerend portion of the plate is provided with a smooth bore ll forming apassage for the smooth surfaced central portion I2 of the horizontalattachment shaft l3. The end portions of the part l3 are screw-threaded,as at I4. Spanner wrench nuts l5 are fed up on the inner threadedportions of the shaft or rod and clamp against adjacent edges of theplate 9 to retain it in its desired rockable or hinged position. Usingthe threads and nuts as disclosed,

it is evident that the plate 9 can be shifted longitudinally tooccupy-the exact position in relation to the drill chuck C.

I next call attention ,to the adapter and attaching brackets orfixtures, one of which is shown in Figure 6. It embodies an attachmentplate I6 detachably and adiustably bolted to the foundation or frame Aof the drilling machine. The plate [6 is provided with a right angularlydisposed ear ll. It is also provided with a boltaccommodation slot l8while the ear I! is provided with a shaft-accommodation hole l9. Thus,the ends of the shaft pass through the holes ill in the respectivebrackets being secured in place by assembling and clamping nuts 20.Coiled springs 2| surround the threaded shaft ends and have their outerends 22 anchored in place on the ears H. The inner extending ends of thesprings, as indicated at 23, engage the basal hinged portion of theplate 9 and serve to hold it normally in a perpendicular position. Thisspring means also serves to allow the plate to be swung forwardly anddownwardly, as shown in Figure 2, in which position it permits the chuckC to advance on the base of the machine to its outermost or foremostdrilling position.

As before mentioned, the invention, broadly speaking, is a drillattachment device for liners and other rock drills. Its purpose is toalign drill steel to the chuck of rock drills, thus preventing breakageof steel by poor alignment. A second purpose is to assist the operatorof drilling machines to start holes and align his machine quicker andeasier, as the drill is always held firmly in proper position.

As the machine slides forward on the shell, the chuck hits the top ofthe notched saddle plate 9, which hinges to a prone position, thusallowing the liner to pass over and finish the stroke. As the liner isrun back and the end of the chuck pames the saddle. block,. the springs,bring the saddle block back to an upright position.

It will be evident that I have evolved and produced a structuralattachment which will not. only reduce the breakage of steel, but willassist the operator in starting the holes, aligning his machine and inachieving other important aims. Under present day arrangements, novice,em-

ployes and unskilled hands arecalled upon to V to obtain a clearunderstanding and impression of the alleged features of merit andnovelty sufficient to clarify the construction of the invention ashereinafter claimed.

Minor changes in shape, size, materials and rearrangement of parts maybe resorted to in actual practice so long as no departure is made fromthe invention as claimed.

I claim: 1

1. An alignment attachment for" rock drilling machines comprising ashaft, brackets for adjustably and detachably mounting the shaft on themachine, and an aligning member on the central portion of the shaft,said aligning memberbeing in the form of a rectangular plate having itsupper end provided with a notch, the lower end being, slidably andpivotally mounted on said shaft.

2. Anattachment of the class described comprising a horizontal shaft,means for mounting it on a rock drilling machine, said shaft having itscentral" portion smooth to form a journal, at rectangular plate having abearingrockably mounted on saidjournal, said plate having an" alignmentnotch, adjusting nuts on the shaft engageabl'e with the plate forshifting it, and spring means: on the shaft cooperable with the plate.

CLARENCE D. NELSON.

